/Engine/Source/Runtime/Engine/Classes/Engine/AssetManager.h
Acquires a set of chunks using the platform chunk layer, then calls the passed in callback. This will download all bundles of a primary asset
virtual void AcquireResourcesForPrimaryAssetList ( const [TArray](API\Runtime\Core\Containers\TArray)< [FPrimaryAssetId](API\Runtime\CoreUObject\UObject\FPrimaryAssetId) > & PrimaryAssetList, FAssetManagerAcquireResourceDelegate CompleteDelegate, [EChunkPriority::Type](API\Runtime\Core\GenericPlatform\EChunkPriority__Type) Priority )